Where eldest Night

And Chaos, ancestors of Nature, hold

Eternal anarchy amidst the noise

Of endless wars, and by confusion stand;

For hot, cold, moist, and dry, four champions fierce,

Strive here for mast'ry.

John Milton (1608-1674): Paradise Lost. Book ii. Line 894.

And do as adversaries do in law,—

Strive mightily, but eat and drink as friends.

William Shakespeare (1564-1616): The Taming of the Shrew. Act i. Sc. 2.